{
  "manageEntity": {
    "action": "Save",
    "entityId": "921726034",
    "entityType": "Track",
    "nonce": "0x365ffe64ec69bd5ada262133286e552cdfb7826c4427c58e00b93f658bb677a9",
    "signature": "0xc7a78e11e24890403c8681317022309f0f1e2d31fe159b440da5df804ccc377929f039e70678d60068a0877108cdd82d479e782e30d23663fdcd556c818083f61c",
    "signer": "0x44Fe9338D9d1405927C73FDA0be0F36ae481Cd39",
    "userId": "983568397"
  }
}