{
  "manageEntity": {
    "action": "Save",
    "entityId": "90693394",
    "entityType": "Track",
    "nonce": "0x2095790df3055bfaf775cd826c7b8e0206a7a57347d8d45c7460879d3bfe09b0",
    "signature": "0x690e770d8adbf11a61221483ba2df742e2c5e1b4be668798331650d3da7e70c179ae226ad4ade84aa2480e7898bcd8b005137d2fdf4f900b7539fa7f0f2d98aa1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}