{
  "manageEntity": {
    "action": "Save",
    "entityId": "1361583161",
    "entityType": "Track",
    "nonce": "0x6d21a457a964baddfb450c0c80f581b8763fcff83833a6654a5da8e21f4f4325",
    "signature": "0xb48da81fc3012755160c7c557d6af0595f997d74e07d5a8cdfa5d810a2f100e870fe98b07e49deb774ee5019158f9912fe15927b01b02efb181e54d833c440151c",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}