{
  "manageEntity": {
    "action": "Save",
    "entityId": "1662828366",
    "entityType": "Track",
    "nonce": "0x4e114f0c5c727ddeb79541602334c0f342703ff793e26d79ef06ee2817f91399",
    "signature": "0xf11cd616f9022198d3f69b9b6ae0589d6e2c76507946879cfa72e9d53094377d387ebeee78bbf69c9f18b9ec5f6a999a5ebf54bac7416149a62cebd0da7f0b771c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}