{
  "manageEntity": {
    "action": "Save",
    "entityId": "1962003366",
    "entityType": "Track",
    "nonce": "0x6122b0f20b65a3d95309b887d3817f60bf025952cfbfdb3c1cfddb367bf74d99",
    "signature": "0x710e56f834855369647980d49c1caff2476b71f7dbb01b06cdd855dd7f3c386318440b5a1a372d48c9e1312d6759af0d6b8753304bb71b807a88acf2034794811b",
    "signer": "0xB57F94Ef9a26d73E8b35D3f37FccD18BcC7eeE00",
    "userId": "850416615"
  }
}