{
  "manageEntity": {
    "action": "Save",
    "entityId": "771825985",
    "entityType": "Track",
    "nonce": "0x8856517999bdf823cbe88c9f516399765bc3148337e784628845bace5556355b",
    "signature": "0x08a6edc8b2c7012d3947c7f9e7f44a73785a9d30962eee3a45a46e02de5a1f596876549442c278bf3a33e203a4f484adadf7deea233ec6108b48fd83701eb5ce1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}