{
  "manageEntity": {
    "action": "Save",
    "entityId": "611464263",
    "entityType": "Track",
    "nonce": "0x77b54983c530dafb0f9ab6a32318eb043ce7dc8c77ddd01ab600379f8b20026c",
    "signature": "0x35a3d5ce62657a792c48111100d8302c3f9b9f3d6815f559542819cd599195b50c5ad10db9acacdd39730ce9bf060c49452f4efb6f64c4c7057c9e09134757f41b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}