{
  "manageEntity": {
    "action": "Save",
    "entityId": "1931665159",
    "entityType": "Track",
    "nonce": "0xaaf89d060d740d516180455ed4975864affa35c4e4f16fcb491c2ff461638221",
    "signature": "0x3899ecb8391cdaac170d20f6335b492619ec914956be3bf889a6cd0038220b8736122b7597334340da9a60b4ed99e1bf8e7746843f9e4e9b5bbe15946aacd5051b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}