{
  "manageEntity": {
    "action": "Save",
    "entityId": "1899299736",
    "entityType": "Track",
    "nonce": "0x13581535dd0da3df18a7ba7a675b037f443040e2d372fee0a4fc75eb50123fb0",
    "signature": "0x86fea6f3d4cfc8ce26a19155098167bd5604121b28b6e4faf334d4e94c09e8b62ce9dc09aa62bfea156d15b51e7a6f8f6e1904fd9a1add99e0a757479e14c4eb1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}