{
  "manageEntity": {
    "action": "Save",
    "entityId": "1253541231",
    "entityType": "Track",
    "nonce": "1792407510468610757",
    "signature": "0x925c79fc276624e2808dcd63fd41d9dc42ae510ecc576810a96bb332333d98133b10d34f2a3210a07f1ebd437a9b87940bd708c784324fd234d859ad262859511b",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}