{
  "manageEntity": {
    "action": "Save",
    "entityId": "2106882705",
    "entityType": "Track",
    "nonce": "0x2b2376458f478f2899c089c1124f552621e59c42e3713763643ebb962844c3a6",
    "signature": "0x4187037d64e6d7fa6f064e6429c0e404be82d76895fe8d2ba0b591ccab5a501519aa029735d74914e84b2bcf7ff06c57c8383c5445e459a8e27b439ea2674a941c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}