{
  "manageEntity": {
    "action": "Save",
    "entityId": "66290034",
    "entityType": "Track",
    "nonce": "0x8171feed35f9cd853ffdf8322e5de889597b48de7c726cf789c49891d9c0fda6",
    "signature": "0xb7023f9621dedcacbb8a6c3d825614077010d2ea87de8d9f96c7f3543a253ef3077792e7da2641a8efe171f0e62560cf4dec5f0dc38fcefbd1d133080c79c4bd1c",
    "signer": "0xbb3E94A6Ca25f3CAF1B8487768C074bE200e6381",
    "userId": "277460613"
  }
}