{
  "manageEntity": {
    "action": "Save",
    "entityId": "694852288",
    "entityType": "Track",
    "nonce": "0xf5da1820bc0c44ebd5fca26d53520f9076fbbe69b775a4d27ddcf410adc85175",
    "signature": "0x20199113e64be4bc845bdfae4079c886728f49d4d38649e71df3b45700ba521209311d81b5d6088ec5d871543b6f1829502188fbfd752740a44e2496aa93554f1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}