{
  "manageEntity": {
    "action": "Save",
    "entityId": "368482",
    "entityType": "Track",
    "nonce": "0x4f8ff386f388cd249ea23a53e5a973d9d83c893d8e273c86d5bc1dd5e51e93f2",
    "signature": "0xb481f04d095f2ed771652101a1cfd16a3c207acdbd3c803029943741716695e14ff9d1bfac295b340dd35e16fbf024e49b9d372d9307cc7272457adf1a2668bb1c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}