{
  "manageEntity": {
    "action": "Save",
    "entityId": "1613763010",
    "entityType": "Track",
    "nonce": "0x73ffb41ea4ccb8935331edc802de2197df6d40459de9305be36815dcaa80da26",
    "signature": "0x9ccc51bd8a20afc3a827ffcf5f7fb8829d75a8ed48e395747fbf55327eb9c25d14b426c525b1893713687888cca1e2f18ea370816fdbbde594015522fde5e6411c",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}