{
  "manageEntity": {
    "action": "Save",
    "entityId": "365747544",
    "entityType": "Track",
    "nonce": "0x805dd422f419d1166b4452ee9bc56aefe1bf790b9effc44778d2578bc3c13122",
    "signature": "0x5facc9a31ed9fb24ffcefae85e2bc9f0ab3122550e1d2d010163f8b518adf22723d9b3c5df5334cdd72d0538a445247b8f1f9e1f9a374c07190f7a5333b133dd1b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}