{
  "manageEntity": {
    "action": "Save",
    "entityId": "2054955210",
    "entityType": "Track",
    "nonce": "0x04d204bd7f9450673fdd6d2a821ac2be447e4871c2cc756de66eef8f7d22757b",
    "signature": "0x731019c6f5670f079eb84deb0f330ab54669c51f4cfb6c89408acb89b1d8b2a94b4f83142bca153eb5199aeaf20260c9105ed65a1a7ab5de4de28fa53831e7431c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}