{
  "manageEntity": {
    "action": "Save",
    "entityId": "2030836708",
    "entityType": "Track",
    "nonce": "0xcb25abc1b8c1713ffe8b99a3026ae53821e8c4b000ea5e4383c689fcc4d1e48b",
    "signature": "0x47661de6d387fc312549aada73d4da7ebe9c88bcdd968ae6a59142dc0e52392d13616ada64704539d8e7eb8f26e13beed100a4c1d5083cc29f6b564c806c93fa1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}