{
  "manageEntity": {
    "action": "Save",
    "entityId": "1315029219",
    "entityType": "Track",
    "nonce": "1792393814651641864",
    "signature": "0x6f88d6ac4db3770fe5f06f9c7e7b74afb4563fa973e14b92b32c310e55246aba2269ad2a0b694d191fc0d754f80ee07c9b8e81d24aa4460013b58efd548f28341b",
    "signer": "0xE9e5656ce6F7Fe41FDbCA982901407eB55765cD3",
    "userId": "670307808"
  }
}