{
  "manageEntity": {
    "action": "Save",
    "entityId": "2131188127",
    "entityType": "Track",
    "nonce": "0xa56713fee91a1f02ab979163db029cb1a011f079c0518b79da0a473d072c6921",
    "signature": "0x0ffdec7f3dc52dabacf35d86524eb743529217d21a0a13beeb822faafa0c8b943e6f152689a8c2389d057ec851981b5c8afa4a89c85e0d549a7122a0fa0112921b",
    "signer": "0xa62D148235ba4488DD5AeD4C534698DDA215B895",
    "userId": "435132485"
  }
}