{
  "manageEntity": {
    "action": "Save",
    "entityId": "1156833883",
    "entityType": "Track",
    "nonce": "0x447a4d4f83ab52dd5daca6b110dd24259a5904006de78b517c5ac11364e74043",
    "signature": "0x0ff7c0938c1b738eab0c4584f7da41dd1196530f81aa855da9aad1b5739236a164efcd17c74ca299d6da35d7975e9bb7247dcd21f43ae41c6e618f72b45943b91c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}