{
  "manageEntity": {
    "action": "Save",
    "entityId": "1493733658",
    "entityType": "Track",
    "nonce": "0xebc992467e7d67484ca72e77f32a83e28d188c2e3bcdadd108b9c65b58c4d831",
    "signature": "0xb54fde76807890fcfeaa6eeea3fd776e269d8747bcfe8f87cfc04c9e7c40885d44d7c309e96ae348b3cd9e65ff820c223d16906ef1cf591926cc694858b452c21c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}