{
  "manageEntity": {
    "action": "Update",
    "entityId": "323879851",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierau4evyj7nbmeuhtrikn6rmxpl54rqytqejlw7e3knbgmchumw2xfa\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":320679866},{\"type\":\"playlist\",\"playlist_id\":557879909},{\"type\":\"playlist\",\"playlist_id\":336192669},{\"type\":\"playlist\",\"playlist_id\":1728889731}]}}}",
    "nonce": "0x6866b47797dc4a249c5093aeb65672e19b6c4ca0e387f32cd7be24b7f04287ad",
    "signature": "0x976e6efb669e6c1b7004511973c210ac96f346ea6394c16366fa33a4a1752e4a3a3f5a3bca83e99e55ed23541af9273c38fc4d936be94d2e7bffa134196631941c",
    "signer": "0x12aD0F6A7Bf3ef1Fb0FFE6e1eF9E50BCa3149Af5",
    "userId": "323879851"
  }
}