{
  "manageEntity": {
    "action": "Save",
    "entityId": "540174448",
    "entityType": "Track",
    "nonce": "0x828047386adcbae48774286be985b72fbab8198b0863477b91ea2ec1c34dec2d",
    "signature": "0x1d98c32a6883f0f0f0aef3adab8aa8d743508d54cde414b4fd3af5f11bcd0976606742eb97f49a2e1e2c714e5751b20393d6412426c13b721f09bceec40a23d21b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}