{
  "manageEntity": {
    "action": "Save",
    "entityId": "1247739600",
    "entityType": "Track",
    "nonce": "0x11fc29586212e95db1e6e2f41a260e5714aea26972f86706aa946af59fad70e6",
    "signature": "0xbeb8230ec27640a6bd99b92f8a2e5f6be92a27f2529f6ae456ef6370fbe5bb802d576944343ff6671346ea00a82cb1514cabcb6e90d944a341669862b699626f1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}