{
  "manageEntity": {
    "action": "Save",
    "entityId": "1909530686",
    "entityType": "Track",
    "nonce": "0x3d372fc333d4171cc346c0af23a64823196d173c233c7133c2ba8404866befec",
    "signature": "0x9d11d746910ff715524284b2af06b8696b796c0f049b4a21fee79d665e9119ca3e8aa6ae4e5573570b46f454deb6c53c2040def2d74b064ff1196a825d200cee1c",
    "signer": "0x98fC2b30E6e70e62dB2b5fAE7b0292DE3D4323Bf",
    "userId": "480962013"
  }
}