{
  "manageEntity": {
    "action": "Save",
    "entityId": "351446118",
    "entityType": "Track",
    "nonce": "0xd276ea47964a8a4db86629352b20b32f9800cc90f9f94701ab16cdc6b71a2552",
    "signature": "0xcd262a1c809afed928ba169501da7af88533c69ada3758e6d66991287d50664e0a57db00c339e36f325f06c991d58f039b1f0c2bad752c94c48e2110d59ad5a31b",
    "signer": "0x767f09338Ac6CE8645c0a76a17a560429b582132",
    "userId": "520958130"
  }
}