{
  "manageEntity": {
    "action": "Save",
    "entityId": "250019",
    "entityType": "Track",
    "nonce": "0x9dea604405f8bd7891c746b4b44eab4d898bf9e062c80584b878d88c095cccdc",
    "signature": "0xf74f747855c56bf2e12045f6b4d2bd364f686d7fb6cf098e6bcb1539d856e3651a370fda84543dca0c94aa7bb131ce2ae514dee373a2a723c18ad5ca5d61551e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}