{
  "manageEntity": {
    "action": "Save",
    "entityId": "1202573039",
    "entityType": "Track",
    "nonce": "0xb776a8ab6a9838479b9497b5a7e7b26ce33d187f0719dc57ae2414eeac2180d8",
    "signature": "0x9776e4043d0215d831e50d4de673fea7ff94550e8eb7e8924a202bf6071d62d72ec7f69b8315ffdb030e1034a32088502017867f4640a8c3ce34a2fc51e4c74c1c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}