{
  "manageEntity": {
    "action": "Save",
    "entityId": "674872063",
    "entityType": "Track",
    "nonce": "1786804726785043065",
    "signature": "0x0aa1bcb32c7b77c75d1d093b98d6741fcba103a4c2853f164d96837d72abc4ca4aee0bfe23f2249558452f7543c47147fc2c976c122c6df8ca4ae28efdfdd8301b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}