{
  "manageEntity": {
    "action": "Save",
    "entityId": "1277699229",
    "entityType": "Track",
    "nonce": "0x244a075a6d35d2a03e7ea63b92315f5502b21bd1a683d32a428623ac646d8137",
    "signature": "0x337d1cf75278754d00ae891fa83724a05dd9ef141a8f0930660981c414867cf301a52249cc1d2296097e289bd7fc094d0681f88f5f046dc39c89d9e40bbabeb21c",
    "signer": "0x98fC2b30E6e70e62dB2b5fAE7b0292DE3D4323Bf",
    "userId": "480962013"
  }
}