{
  "manageEntity": {
    "action": "Save",
    "entityId": "980876",
    "entityType": "Track",
    "nonce": "0x20a8d64b04142d3c3bec50590d2b30d42cb5e047e41de13703bbbf0da3fe2483",
    "signature": "0xb0b7f2c25ef1b335525a753bdf1c93e85cece439f828e75e2bb1cd1e1aa379a362e44c85619780678f90121897052dcf6e032185ef61c48d536e969098e1ee7d1b",
    "signer": "0xe1eAe9Fa3Fef187944BA6cBa5C534e1ea257CA4E",
    "userId": "344552512"
  }
}