{
  "manageEntity": {
    "action": "Save",
    "entityId": "685221019",
    "entityType": "Track",
    "nonce": "0xfdfe78e85656016f4562bd0e0eb62dd6b0a8eb87ea41485eb3cd0c48ad216261",
    "signature": "0x9302a31b90b7560aeddb7d7d79edbe50edc105f38eb432bd06b2a67e25288a5030140aa1d73a7e3c80f7abab11866ddab7dc9d9d5a0553573d9a2765efecfde41c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}