{
  "manageEntity": {
    "action": "Save",
    "entityId": "131483470",
    "entityType": "Track",
    "nonce": "0x64a73399b9700712f9f33968916d157077b72fbee57b00ebf09a5a2750ff25eb",
    "signature": "0x51ac91b52601e080578879b2c9fc6c2d406e0277bc0a155e1b2d1bb85071f0742b51b0f60add9d5778a3afba867449005c99d082c9bfb49371211f218237dbf71c",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}