{
  "manageEntity": {
    "action": "Save",
    "entityId": "1902998614",
    "entityType": "Track",
    "nonce": "0xac250df00e132d59d6f94bda0fb4b4029e70d8ab4fc42ab4053693f630425aeb",
    "signature": "0x55c0ae53a75b315511f40119ca3d5005cf06f90603955d2b94209ca8736415e0706f0ef69ed8691159432efc7223418f77d1b10854f287be740e3e22f986bdd91c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}