{
  "manageEntity": {
    "action": "Save",
    "entityId": "2108923786",
    "entityType": "Track",
    "nonce": "0x92b0e788b974f2cafdaf986660333f3f1a4532318f746ebea0feb52e5dfcdc46",
    "signature": "0x09dda0edc7ae91889652fd7644a0a7bcdd05d1d6aee42e3fc7aa08c240fc2b8e20e23ab1e201085cbb6ffa072e8c28edd651b8b4d9615ab610b0057d0b95c3e81b",
    "signer": "0x91A0243d0c4b44cB682cB60883cB72C26a8Eda55",
    "userId": "298293683"
  }
}