{
  "manageEntity": {
    "action": "Save",
    "entityId": "1830766702",
    "entityType": "Track",
    "nonce": "0xe3b5bebd4fbeec0aeae4ced07a59278a56bed0331387219e6023a449708706df",
    "signature": "0x9867f4223c07fb46e9f7f9f3686a7809b7154a4b27f9595e91e9d4db0e80b6464d864ad5b5ce0862d9967d27c09de2d081bb5442b457040afaf6d1234a9c6fe51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}