{
  "manageEntity": {
    "action": "Save",
    "entityId": "230364771",
    "entityType": "Track",
    "nonce": "0x740049afbaa85e2facd3334736f2ae71033cf4242ff900f95e8325e827c3318d",
    "signature": "0xddfe8b1591d974940fcb2a8560484e192ecefe0d0171728b1e90f32ae165bc4a5df0b633fc36e5fffb286ee351f3e5fa44dc38d6c216b0ef1111bf78ee704bee1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}