{
  "manageEntity": {
    "action": "Save",
    "entityId": "856041885",
    "entityType": "Track",
    "nonce": "0x8e837da97873a4a1909acc9d446b7a902a23c9f2e880925ef528583cb502b1f0",
    "signature": "0x186c6955caf652f34c8588045cf3c49aa8a6a1df74259a7e0a470570ebf1134232ce7091074b9133c2c4dac9bef5cb8dc8c948a88e580516f384688c9bed25971b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}