{
  "manageEntity": {
    "action": "Save",
    "entityId": "1404716487",
    "entityType": "Track",
    "nonce": "0x4ffcf774606b80c764c6f9d449eccf923b2d9e338271ff6260f44e02e9a3dbbd",
    "signature": "0xe5d1b232f8b16fe183b7fc302d5e727c3df84ad1ee692073c4fd5cbadfb5e59121fb671e6a81b67be1a19833f1aa2cef65586aa0f0235c5475c1de469bb4c3801b",
    "signer": "0x94e0dDC50579175818AaCFBC9aba8B065fEf2a55",
    "userId": "460147282"
  }
}