{
  "manageEntity": {
    "action": "Save",
    "entityId": "1448317059",
    "entityType": "Track",
    "nonce": "0xcce2700e3f4fccfc67f7ea396f230207662b55e238cab4c1513295b8ea37d18f",
    "signature": "0xee4726de8aac2dca69baf2c7a5b3f1606e108841bd01edaf79054d700c7ef9c7658358ecc29cb65c07053b16013411df06770f3220f17865910309f26f59c9911b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}