{
  "manageEntity": {
    "action": "Save",
    "entityId": "1401627016",
    "entityType": "Track",
    "nonce": "0xbf61c893c84aad2416080f8295f4718686c5360c715a0a3a72105d70199f0bb4",
    "signature": "0x7705ee9e0fd3b18c1b4aa29ab86af04c9ce585d5b77a10c85ae2ac0bc7522533008b29532434ba38b7b7dcefc04bc9f0ae0e23e0a10837c675d50de2936e09f91b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}