{
  "manageEntity": {
    "action": "Save",
    "entityId": "1072956",
    "entityType": "Track",
    "nonce": "0x65ee598580980af7048d330b3f2f92bb57f17266ecd5f93619550f10e2269c2e",
    "signature": "0x1cf13a01e4ad434549e8df0670d7250ba16b781b0de92884268f0f9b67278383528a264bc785d830bd8aea5f8bfa5695dda02015457d90967034d18e742242fe1b",
    "signer": "0xD569dBf70E589bE307C1c42057A3f62906e44b3C",
    "userId": "747878110"
  }
}