{
  "manageEntity": {
    "action": "Save",
    "entityId": "1506781172",
    "entityType": "Track",
    "nonce": "0x9cbc3c8d90da2d73a0ef165c739dcd8f5507fb071e83aec299a060c53f354d78",
    "signature": "0xb772d7e83c41606dc3f6051e71b66643f36039a06ead718ed36b3797d25e81784f2c033d8653ac372a7e71e787f287e03b6e6d9ba349db8c9d9c4f487751f2b21b",
    "signer": "0x26Feee0AaDc0e2d8f7aBEd5cdb0bCD7D325F618d",
    "userId": "354535"
  }
}