{
  "manageEntity": {
    "action": "Save",
    "entityId": "321930054",
    "entityType": "Track",
    "nonce": "0x93e86ea2006a1e312b94247dea5727f9e1d59f3709648a09e576aaacedc18bf2",
    "signature": "0xf58dce24d25d67e6ee332299550e363bf0d65963962366c792e5132441daac7f47e6b6861567582ebef4220f14bce7237da5172cdd4d3b82ff650eef9d4c150b1c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}