{
  "manageEntity": {
    "action": "Save",
    "entityId": "516644106",
    "entityType": "Track",
    "nonce": "0xcd6d00d2aef2ca5cf98b6f26898400f967c793b93bdba54345fc7b70bf1f4d18",
    "signature": "0x2ee17cf48a748db23dbbdb0ef49774f8c3b615b0c3f8443cba9d215b75a6e8c54e277857fa526d83a77d143cd43c35bb551c426bd18ee6ef82c3cf2365abeb4e1c",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}