{
  "manageEntity": {
    "action": "Save",
    "entityId": "306676",
    "entityType": "Track",
    "nonce": "0x0206cc04b7db41eb507b6d6990e5dc742ac1601d452d83b4e78b9e19579e6d5b",
    "signature": "0x42526636b8019bd0ecc96f7bb457c321bd7f19e626da82907bada7614a85129577f549303ce33b9e4d4d4eb12f06ee717401798ca207de0bab31684b3c9e1f961c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}