{
  "manageEntity": {
    "action": "Save",
    "entityId": "1709189616",
    "entityType": "Track",
    "nonce": "0x508dfa62ef7bbcbf9aa203432cd9fcc31e61d3db519d46063121d0c5f37c03bd",
    "signature": "0x20950552574016fe22ea66cb85def4874874edc61e63e987938608be118aceae2bc495e2335778144297b0f7452b33608389458d8f4831398d0a1208fca4657f1b",
    "signer": "0x061A60900C738C67bcf3F9Cb7Fe8f703DbEc8Ee0",
    "userId": "718327235"
  }
}