{
  "manageEntity": {
    "action": "Save",
    "entityId": "1906100663",
    "entityType": "Track",
    "nonce": "0x7613ede05e6a43e5cb4be1c9bf134330883a9d3341e9f708247b80e68c3b3a32",
    "signature": "0x6b76e2531d9ceddf92ac4adae89d6b889c20b37d14e8af119b279d891cdbeee42d2fee4635d3a4780ccfdade5eba3ef44dfd80117cecf4561b0c47458f5861ec1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}