{
  "manageEntity": {
    "action": "Save",
    "entityId": "2031791419",
    "entityType": "Track",
    "nonce": "0x9ccbaad4af59166643e09095efd437b6198c779b1252d65d088aaa06855d4c63",
    "signature": "0xc442aaae3ec8f04bfc7ea9e93e68210602431a517483094f2812ec6134bffd9603eb1fce52986d4e30715ce9130b4b0dfd5025d200053de1844434dd4566d9db1c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}