{
  "manageEntity": {
    "action": "Save",
    "entityId": "649403181",
    "entityType": "Track",
    "nonce": "0xc0ddc5713e7b6d1430c15b2929384505516025c4bf112ef24c82b308d0ec9b57",
    "signature": "0x6aef6f8ac13b2b6fe3d1915004d841ff57c12a0d61033931ee5f122ce1f0bf414ba0e80af11dcccb5d11cdda4780078217aec9b3ef08e1d448562f8a394b4e161c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}