{
  "manageEntity": {
    "action": "Save",
    "entityId": "136961866",
    "entityType": "Track",
    "nonce": "0xde8d1db0e4eb9c802185b5ff8e7b1f901c3b3f620edd4407ee030e36b4acc6f2",
    "signature": "0x15b413722edf2d6a48290390e1fadfd6952c66e10677b199c06c58f37146381e542069fcd65b864198c56d20a8b15768754961521a29f51b0a1e7017951285421c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}