{
  "manageEntity": {
    "action": "Save",
    "entityId": "1279195426",
    "entityType": "Track",
    "nonce": "0xe49031ec43152693685846f2a66469919a5d98e88f95802fc8a123aeb581eace",
    "signature": "0xfb59809b4e5fefe07f4d8eba2d57899ae88f8b42f868d13bf502bb87e3dc0cd82a27a66bbe21dfbb1be9f63a589b62c2a39d3902dae02aa6f91bbcc2d75d4b8c1c",
    "signer": "0x44c6c9974E4028ab550E0311F9A04Df023477958",
    "userId": "152450"
  }
}