{
  "manageEntity": {
    "action": "Save",
    "entityId": "541268",
    "entityType": "Track",
    "nonce": "0x9475fd1e25f95b098adb7908f34ff57ea1eca6e102e695f5d8837ef76b91f452",
    "signature": "0x56f92ec67992dad4f972c3194e360201ce5cae985bda4862c0cfe14fdea4e72d53b4edd3af702346aee8b8208e5161a2f7517ad00946a96a4b84573cffe9011e1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}