{
  "manageEntity": {
    "action": "Save",
    "entityId": "302409055",
    "entityType": "Track",
    "nonce": "0xd5deba2ac24b82ffec913350b9f10db24099367205174cdeb087756f4721872b",
    "signature": "0xcdf4cbd79eb55f9d1b518785b74ae6e3518e28bcf1f33c6d5a267ddaee9433410f4e5dd5184da0770da675a8213c211bc0db2b57ef374ff6336f82114ba90ead1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}