{
  "manageEntity": {
    "action": "Save",
    "entityId": "768920856",
    "entityType": "Track",
    "nonce": "0x8be05a07d31f4a597644b267d618ddeecdf0887be604e86ef450d8fdc8dae9d3",
    "signature": "0xbd54040935c612839cb82d1fcaf7e185de12a070eeb515140c6a9c432e445c7c0b14de1816a6f392338add9a2a34ee30b540aad5d90693fb8cbd0082793db8ee1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}