{
  "manageEntity": {
    "action": "Save",
    "entityId": "214639",
    "entityType": "Track",
    "nonce": "0x02da984e5f46d3b123a78c0f983aab8a21c3d41ac376fccfb012f50abc496485",
    "signature": "0x9ea73ae0dbb6229b63de1a0c3384d175d403f70d7208bda724983af8166b6de37e78b722f36e5675736083ea6caf2f0df1ecd40ffc138d6e51aca466d69387a81b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}