{
  "manageEntity": {
    "action": "Save",
    "entityId": "953877",
    "entityType": "Track",
    "nonce": "0x54ee5b0654bffbff66537c04b1a93c80dcfb19563188a5de8131ac0d07d34fe2",
    "signature": "0x1c92e5da4dbc3340f84bd2cd1e64a42049e4a4682257bc46b6354bf1afa8a2e17f521f764d4efc7daae7deb11ed276697b5fad50135786c42de63768438e0ee61c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}