{
  "manageEntity": {
    "action": "Save",
    "entityId": "1754225077",
    "entityType": "Track",
    "nonce": "0x8f1c4b620e88855cfa314653630b279aef1eb094e9255c6335e42037d50a1787",
    "signature": "0x02f324f21072c036d90132ea5af3c01f43df0cc9f228aca7315e6257c8f3876e644f834d04e289eeca7ea8c332c7b9e1360999e1747fce30bcb32c89e2383aef1c",
    "signer": "0x11EFeB5E02d1E5FF95b12f694953DC15ACEc8bbB",
    "userId": "191130508"
  }
}