{
  "manageEntity": {
    "action": "Update",
    "entityId": "821211738",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x09e4decb289d1c0d7b71d11b939ceb9f62a1497576dbbf3785ca638ed78bfaa0",
    "signature": "0x13ed195748aede8e5106416c4ae8c010786a6825a234a66a9a5232a917a2f2c908f59741dba7945f1c9292f25a7b490ad9c780acc3d4734357a5180f79cdd0b91b",
    "signer": "0xaB1AdbeaFF5f057Fc45F7856dD79a543b5b52e34",
    "userId": "821211738"
  }
}