{
  "manageEntity": {
    "action": "Save",
    "entityId": "1914862206",
    "entityType": "Track",
    "nonce": "0xcf41c83050cfea7908f399219d46319eaf1b3f9361a1fc969f66e71cf26d6728",
    "signature": "0x999e45bd806add50ade6bcc0a71b116b4dc7af0ec18f06d136e4df86c8e71896220f72c056e37564d08be97c1cccb9eaeb856bfb75d3dca760720f51bcc6d5cb1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}