{
  "manageEntity": {
    "action": "Save",
    "entityId": "272319",
    "entityType": "Track",
    "nonce": "0x9579feb79b67a41f0d15a7f92cf6ac27211d70edc7af90c1c6716900799b8a30",
    "signature": "0x49e237399842e6b8d7158e5f3efb4b33f8063edea74b4e63bf57b9eaf340ac9570f1c6b679bc815a46b06bd3b1fc1bb7bf3d865ed8a6e748d426801386530c151b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}