{
  "manageEntity": {
    "action": "Save",
    "entityId": "256381977",
    "entityType": "Track",
    "nonce": "0x3245e003e24158ce964cf6374d418c3e33a5571e5f2438bcd2b86c8e0ca77424",
    "signature": "0x5ecd283cd282e8fadfa8c1841c0b77da5ee2ef5c3642a6be886b0009270ffcb41b55cbc769e97c0f56e6dcb053f9bfd6677fc743e2a39047ac1fc403e9b1bcee1b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}