{
  "manageEntity": {
    "action": "Save",
    "entityId": "1994685059",
    "entityType": "Track",
    "nonce": "0x3cbd9de5c00d650d02153ec0d798a2c63427cac7f8f58c4662077c071bf997d8",
    "signature": "0x857ca420b855fcb257c828a2f7448cc0aa91680f286a697f251ca97aac966e680a8a35802492d56a3aff3a96a25308149a8e49a0b74eca8c7ce65edff4eb813f1c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}