{
  "manageEntity": {
    "action": "Save",
    "entityId": "26719771",
    "entityType": "Track",
    "nonce": "0x666bf69ddf449b6da3ec8693ea2ad37f4c6c8c7ac2a6ec848dbc829e9ce92cdf",
    "signature": "0xe0209170099f7c750e1f4f637013a0b6be8311272d8e5b04be9818a4705778144b1a3f366a777f815bea21f3d9cd6bc785cc82f2fc830efa4d29336ebbf1f0ff1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}