{
  "manageEntity": {
    "action": "Save",
    "entityId": "574903869",
    "entityType": "Track",
    "nonce": "0x4caed4ddb7b5e6b5ccdb78271e621fdc6c411e4ee8237b28acaffbca07fe6c86",
    "signature": "0x118fee36ad28d9bcfdbe61a620c48063e2d282bfba222c6820980fc4778f73c860d53f5be9cfe538d7bbf7d8d451c4a0e0ed2f80ecd609101ad4fc265092b5a41b",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}