{
  "manageEntity": {
    "action": "Save",
    "entityId": "1226597063",
    "entityType": "Track",
    "nonce": "0x7d92cb565f6125010b2eb460ce336846bec611afaf6447f4489f372caeec5025",
    "signature": "0xc8e95437ae855c6b76393ee55384919e95325542ca794d0fed969b3803c0bbad66ce54ee278d488b3980c1f6c69556ee43fcf3439a7b42c90920c12addd82f791b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}