{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216815821",
    "entityType": "Track",
    "nonce": "0xafae3361f70726f5786a03f97eb5abded28381785a11edf8e5f67f5661888e61",
    "signature": "0x7505f1c85ddbac70336f769a0bbd6573f80a64cee7423434fa6c9a7e7128c0b310568c8f49264097ceada0c7d85b176cdb4c4da0f7262b608199b81a890df5d41b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}