{
  "manageEntity": {
    "action": "Save",
    "entityId": "1286864435",
    "entityType": "Track",
    "nonce": "0x7332aecc0e1ea6c4d07bc4c335e07fd1dcbb1b4c319629e45be682386d106c48",
    "signature": "0x9952e69351412e0fb50ce5a17cc99de8248322e1c9077b3615c983f10d02a74027e576d7c8c26cad1e8c90e604c53b3c527ced229535a919f593aad5a33897e81c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}