{
  "manageEntity": {
    "action": "Save",
    "entityId": "334756688",
    "entityType": "Track",
    "nonce": "0x91d9741d3e6907567f2cccb16cbda5070f89673a75a449e520635ee93756b327",
    "signature": "0xb941c524bcc60d84dcf2e86bb62be78526df59c8dea06a7c8a137a40f78aa1d713059144e66501a8a18e3ce65f5062396422e5811e8638bc9d2e4bcbe64db1621c",
    "signer": "0x6AAB6EaEa3f7F15750b649C269b0391dcB19dEeb",
    "userId": "92019297"
  }
}