{
  "manageEntity": {
    "action": "Save",
    "entityId": "1050440",
    "entityType": "Track",
    "nonce": "0xdc946b6349e51c6fb40cb3b12423f88fff9a25f29458fe0dfba805c9e8897768",
    "signature": "0x750d8cba0a8a00d2f68257504e5d6d84034f29802c031cf1df348b351375b04219f8068e3e46b2f8ef99a5059ba969c721757a472689c6ccedba7c4e7ce59afb1b",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}