{
  "manageEntity": {
    "action": "Save",
    "entityId": "753127034",
    "entityType": "Track",
    "nonce": "0x808ff26ee9798561a7b3d39df4d66bebbb69b8e442a72a0d9c4d34d14fe3f4cb",
    "signature": "0xe9a27e7a9312ab94a71e8e9bcdd204bebd6d80067ab2adea78e9ba1deb150af72d3bb5af84c12e3b7c4a2ccd00eeaf1a97703f9b73d62b3d06d0075cf28df35a1c",
    "signer": "0x6068Da6B0a791A756931bE32de98D46eBb95890c",
    "userId": "475275462"
  }
}