{
  "manageEntity": {
    "action": "Save",
    "entityId": "1222268066",
    "entityType": "Track",
    "nonce": "0x84575db2699ea9d539f24a22bcc20a092fa7505fee0ae94e1a13126b199a311a",
    "signature": "0xe3829dffd4129861b62919a3f521059dd95dd5c7b837b6eb665aeaecd8e096303d81022c80baf9b2dd44c111a28b25437b94e32eb6ebe5b8edc19790e3795f3e1c",
    "signer": "0x53d8e61f7BdCd69E26B5AAe8F197464091224DB4",
    "userId": "99786"
  }
}