{
  "manageEntity": {
    "action": "Save",
    "entityId": "338246",
    "entityType": "Track",
    "nonce": "0xe96da6b4ea9e12f16a055386a8ae18f927c3fdce7a455ffdf95dc0251612f67f",
    "signature": "0xddc72109a663881604067469e4106aaba7f0bd9310d40a9bf75f44b4183dd8ad536c09941325a78754f06aa72d434feb09c9c211de655048865a328010c2946d1c",
    "signer": "0xa4F2b7C5923c7C3cea6ABbe732D1556A9a36960E",
    "userId": "313524"
  }
}