{
  "manageEntity": {
    "action": "Save",
    "entityId": "1647346249",
    "entityType": "Track",
    "nonce": "0x86c2f7e5ff420be1bcd61763e03935d7ca8128b7847d0174a05c9df8a03121a9",
    "signature": "0xa98d4aee72cb801a94c2009c1cb40652df398d9d4a4c9dcc52756226e85cf66f4fb7dfff61f5d7a5b689b4532dfce4ae5c7104bd002a49c94f489072ba2ad4a11c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}