{
  "manageEntity": {
    "action": "Save",
    "entityId": "779828",
    "entityType": "Track",
    "nonce": "0x4be79d9682ad2b9da15126e17c957bd97592dd91155344a507707ff633e22fde",
    "signature": "0x7ca739c77f004d72671459fc6ba4fc7dea3ee58c0c929df9b92a96e580d6095f0a8a6ce1c5b7c35cccbe42be6e21454facc78756b7a0ba928ab21528ccd3b6371c",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}