{
  "manageEntity": {
    "action": "Save",
    "entityId": "220419",
    "entityType": "Track",
    "nonce": "0x1b995a11534cb40f080a31f0ecb4430d543e8ba4c4ebd123fdd87bbc0c3f76a9",
    "signature": "0x4d635db95d064dd8e8b006942c86b080a688ef46a47ba1cc7783591cc42cd3f56382625672b48374c08578fd77e9f152f097dced827d6429f00f369856acc92d1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}