{
  "manageEntity": {
    "action": "Save",
    "entityId": "1834647273",
    "entityType": "Track",
    "nonce": "0x71aeef77d14abca24072630fb12ac8489809988fb086c22cf505013b6ce150c0",
    "signature": "0x126e62c17279e48be7db937a12e5400f356b490e5af04ed3e801a6d6299ac29912e865db62366f1b7f870e6486a32d3166f67857a6c29a46653ef25bd6111af41c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}