{
  "manageEntity": {
    "action": "Save",
    "entityId": "503990386",
    "entityType": "Track",
    "nonce": "0xce58722fd61b79ff07a1d879dcb6af8c5bd4cf50e29b0567a8a9e1eb31227760",
    "signature": "0x269bd3a0f9174061ea42899039e3773d79721303a7fcbf0b9a7ce2e44bffd8653d8b264580b2aae16acf16ead7eb949d379d7e4e2412311f85826b40070bcc2c1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}