{
  "manageEntity": {
    "action": "Save",
    "entityId": "1753173398",
    "entityType": "Track",
    "nonce": "0xe5789dc1ac959d47d539f15340aaae17fa1403511f973b626f880c700302b4b2",
    "signature": "0x12a181d87f0dd3394107f060855b25b66c733bfe468ceeae82660ee168026b5d0c9242d00a5f304ba5a57b8e35dcf76a8b42d5adbb99ebc34b96331b47f078751c",
    "signer": "0xc2Bc01b734bdA56bD8c24B5C4353C6827325d999",
    "userId": "528478879"
  }
}