{
  "manageEntity": {
    "action": "Save",
    "entityId": "296463265",
    "entityType": "Track",
    "nonce": "0x739e7a2f8468ff66f5dd0b6654d69264aff2bb706671baa1fea0484b5d4c2a69",
    "signature": "0x10257842ae508a3e8c8fa0afe633cd8de1be6d36f00ba5136fe67ed08ccb473259799279660d0f1cbf6f9503355f4fb1a0b8d98c8e9261acd9c0275f20549c041b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}