{
  "manageEntity": {
    "action": "Save",
    "entityId": "983631978",
    "entityType": "Track",
    "nonce": "0x4dd5112f1f938360d6d03994e3241baa3a81a9d4c50dc6655b647cea1f04916f",
    "signature": "0x4930c8dd9e3a0e750ef084001084bf62d6bf77b6187cb989b1bbd06833f5a657044636473632654ec57d40b8894909a03149d8b72a50ba910aaa6417cd9fdb991b",
    "signer": "0x2B171214e998033E806F72301307B2160CD94DdB",
    "userId": "489165782"
  }
}