{
  "manageEntity": {
    "action": "Update",
    "entityId": "776863300",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x5bf10923a8ee502b5776f3a0b14b42ec70040f8fdd127e029899a39063df2b15",
    "signature": "0x9391538a3eaa79969b647997692507128b36f2e184a68ccd972b17fec2ca3d7042962a7207bfbcc5d41ef4de29f8580424ddca90f994829cb3bf4cd510aa00821c",
    "signer": "0xc9EE21D0D541d8d1Ff4Fc82Ee12f95E59f196D1e",
    "userId": "776863300"
  }
}