{
  "manageEntity": {
    "action": "Save",
    "entityId": "2077301921",
    "entityType": "Track",
    "nonce": "0xfeb7c6b3e3fac1ec686d0770389c6643ea46a6393e607cadeb566bfff733fa6d",
    "signature": "0x1138161fd316c3b8e682b01966afff60248cf7b694e2a7e90c1a8053594d79fa307755d391c9099528c0373f9656257e70674087de57307e2171065535e4013c1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}