{
  "manageEntity": {
    "action": "Save",
    "entityId": "108753088",
    "entityType": "Track",
    "nonce": "0xf6753fa5b0848eea2964de1e6a7ca6c26e1be5588390bb57a9c42821725878dc",
    "signature": "0x1b7c0fb2135d62ba6e37faa58b8c058b0b694e333f319487aa47a2b6433e16501e7e4c2c0427a45cec79d8ef7d2ae3b4ac94e18ad8290d01524b603fd68530321c",
    "signer": "0x1642AB480EAD0cea9776277347Cbd3e5Fe9889f6",
    "userId": "711757920"
  }
}