{
  "manageEntity": {
    "action": "Save",
    "entityId": "1638022191",
    "entityType": "Track",
    "nonce": "0xb824df1e6409f671ecf98e91507c5d50aa8e91d09f585b07617df33efeb5846e",
    "signature": "0x8803949f1b7c96fa91b25bffb2275027df3e98ba6ff35f2f730d8604f4fb959356d55efa479ed456ab5ce2afd54859e10ac85ea5e3935bc888483dd7236d45ae1b",
    "signer": "0xB2A34b43465721B690e6CbCfB42C0cdC30050183",
    "userId": "103086"
  }
}