{
  "manageEntity": {
    "action": "Save",
    "entityId": "1516972248",
    "entityType": "Track",
    "nonce": "0xb887b5d55523f49f92328d1b10cec74a49433e39b641703314381da97bdfc454",
    "signature": "0xf704208fc9ce37c01bdb79a4c59912b79c50a89f5dfb5823fe186db4fc2c84070973b86f4b992d87baacc08c703ebb53bbabf5ac430e4832e3c3274014d5a7bd1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}