{
  "manageEntity": {
    "action": "Save",
    "entityId": "1012212",
    "entityType": "Track",
    "nonce": "0x8c9d9b22dc7ad6994c65920cda47b3383e34820782ff13c62580422ccf3a6734",
    "signature": "0xd13b10a6c8189ebedde93afd063cf86bfb7789e32f0bb310804680966c1be44c23045b92a9233f51607050fd9af3e8e199b23a7a5323d433b7c943240458a8b11b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}