{
  "manageEntity": {
    "action": "Save",
    "entityId": "1916911089",
    "entityType": "Track",
    "nonce": "0x223bbf836b97ab765d5665559042734748a9c2fffe96e1829230e1dbc53fe4db",
    "signature": "0xb80c0f7e9c0efbd6e49e8e36f05c391e6df0ee1101741efe3c1367a5d4d24f767b176016d8f8b2340d1558ec9fdf3347427e29e4506bd0480754eb2e815ded9b1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}