{
  "manageEntity": {
    "action": "Save",
    "entityId": "1854109535",
    "entityType": "Track",
    "nonce": "0xed4e1359a90f15d1afc3588231a6f581d4416ee7409d1b66176f727322cdfbe5",
    "signature": "0x14936110dcbdb7d422fe49d92229b27dee82b7052759dd73447f7782f9e397662ed049d6cf1663f0e6334f42c1d716ce632b51695472657f3b2dea6a70ba47d01b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}