{
  "manageEntity": {
    "action": "Save",
    "entityId": "391814965",
    "entityType": "Track",
    "nonce": "0x20963238af489ba64c9c97cf0c8d0e9fc9c9d87412ca62224767920e187f57cb",
    "signature": "0xb47f3d6700221a7a3f85ebca42d7a12585db31bf55a0304e8625c25e28d91e4e7cbfe362beb80747cb8a2b38029c33c0ca27fe20f19a0c521d54c498876937741c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}