{
  "manageEntity": {
    "action": "Save",
    "entityId": "1233961907",
    "entityType": "Track",
    "nonce": "1788456072573551962",
    "signature": "0x2e6319d0b0a5f47556a1cc0525fd67be91c213849f6cd064eb38867c9551ff024ecf043dabbf629c6df3637857bb8a87b135dd61f17ff6147de3782b3c19ba941c",
    "signer": "0xF1f4D1515EDE23445C949c6a8dBaE8a064153588",
    "userId": "199729601"
  }
}