{
  "manageEntity": {
    "action": "Save",
    "entityId": "2097250851",
    "entityType": "Track",
    "nonce": "0x3da1831d77a524c81827d47eaf29cb73633a8fa49440cf4de20729144368a47f",
    "signature": "0xf8f074c2b4926e8d7375cc4eeb7062c5148099e074c8bf1ab665053bef4ed39244c8c2e2aae5fda358524543b33bb21934c35360d29ea2b94f59c5cce96e41801c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}