{
  "manageEntity": {
    "action": "Save",
    "entityId": "248354585",
    "entityType": "Track",
    "nonce": "0x2c04938cf4ef01fb04c501aa21a49341b2fb0941e8dc991cc1d1bb58c7492621",
    "signature": "0xcb685dbd76334cafc3a5172ff7b8e86db3b1455737bba2e602de8ec8a40272fb1f90a542eca69a313ce0123e843a2429e1e64a02d4bd82ebf0b2d12b56c4bc9f1b",
    "signer": "0x65A498876e76FaEED5676cb4d0B469cD5A7F44Df",
    "userId": "61841583"
  }
}