{
  "manageEntity": {
    "action": "Save",
    "entityId": "1252340632",
    "entityType": "Track",
    "nonce": "0x125fd138aa77c1e26f0ec9d57fc676218498917c6ca3f42d85d9e8aabeabbee3",
    "signature": "0xa6a61b350832fa7c4905aa5b2fb963389b260afba5ed869565dd67c266c20d29551683cc7a2b6f9859128da7046182d20f82f085ac3d38bab2d70c0e86a9911c1b",
    "signer": "0x1A748d74Db6424f9EA1Ce41A3A445631765103bc",
    "userId": "799948905"
  }
}