{
  "manageEntity": {
    "action": "Save",
    "entityId": "703072139",
    "entityType": "Track",
    "nonce": "0x60b84557c40ad2ab02f70ea9cd4980f99177022063dfc9d7ebbc1118a2fb6f31",
    "signature": "0xa3fda1778c5be503568f55e67bef6d0ae5b4b9a4729a46197f2f61ceee4c56a407d832b320fd699b76be3fb39ec29d04dc961ca22aa85e262bd889810c4e61471b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}