{
  "manageEntity": {
    "action": "Save",
    "entityId": "1850812612",
    "entityType": "Track",
    "nonce": "0xafbdd67a3422445b8a68768cf15c2e75c6ef0077a6eecfa032a8dbeff645b8b7",
    "signature": "0x67585a0aea292b189b8e55984b7a5138f08194cafb0bca5d3fdc11f5e8ab8c5c00c76f43b7457745ec940caf993794e424ca41f4ca2746337f15808d13a447b91b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}