{
  "manageEntity": {
    "action": "Save",
    "entityId": "686566664",
    "entityType": "Track",
    "nonce": "0x8deffc9304b9a5bf181d98f0aeb75c0a6c77a5a69512a0b4d68811de108e4f01",
    "signature": "0x2a68c0b18c6650e7128cfcb0881cd6cde516caff02a9e848d4eed6640ee7f66f7c7107474ad4d8508ce7c0038847660672ce2810ae1fdf91b73eb5d459ad5e2e1b",
    "signer": "0x7315e02d352D97bee742C3B3D87F3277D05bA410",
    "userId": "909822926"
  }
}