{
  "manageEntity": {
    "action": "Save",
    "entityId": "252060",
    "entityType": "Track",
    "nonce": "0x003aaabd87d5272b8b16473bb8c9a4a60c0c920e68db6e486979c58b08e91c44",
    "signature": "0xb9e7dfd3d3571e0e6e184896411a6f776fbd8e4b30acdec9e736abb536e001112bb62c47d29fb14e205b53d0eb1bf5cd8d80911f999c25f3106814b19a4ae0d71b",
    "signer": "0x67479063A246B10560F7FfC48Dba47268867417B",
    "userId": "745004514"
  }
}