{
  "manageEntity": {
    "action": "Update",
    "entityId": "507305669",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x60bfb9e046b39390d9a1a6fe2901562eb8e0a5dae875fd1864cc5a9f29fe1794",
    "signature": "0x13f1fb0dd30fa58565a181beb5a74923363cede595e50e1175f4841649bc7f9647dc4d7941840a0c76499d8a5af96d669fb216e98b970b265b074e6454eca5f21c",
    "signer": "0xD0E16C2194F3FFa74A153568367c42415B0b1cd8",
    "userId": "507305669"
  }
}