{
  "manageEntity": {
    "action": "Save",
    "entityId": "1703642832",
    "entityType": "Track",
    "nonce": "0x9f6ea3ef7ba4121e2a787650b339813813b9ed5a09e63578346a6ef6b6cf1ef9",
    "signature": "0xe11d6eee95dc09a780f1b57fe19d81218f2d5d13e239dbf581fc49f685214d9f0ffbd14105bbeca7176133976461bc3682dc05f0c7625e63c11f77ca1d7841661b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}