{
  "manageEntity": {
    "action": "Save",
    "entityId": "1228567066",
    "entityType": "Track",
    "nonce": "0x16b0381254cba1d15f087819aa4918c94189945355b808fea3a6617ff944ca14",
    "signature": "0x5b0501dbc13c9f189d46ddab6cb0a59182913e5f8ce803200577f3ed9c9382195ccbd45487f2b912f9ae37730530e57676ff224dd0ad446256b4379578c9527e1c",
    "signer": "0x5D012C880480A2E1ab4345f6F374CFf73e040331",
    "userId": "10449019"
  }
}