{
  "manageEntity": {
    "action": "Save",
    "entityId": "1277268861",
    "entityType": "Track",
    "nonce": "0x37785240c511de684d56d8d92717bf3620fb102070fabb32a2e2d9fa25a747ea",
    "signature": "0xef41cf2f783c898d70111e66b27babe0e52ff74f0dc39ff320122a8e19806fc516b674f1be017f8f08d56397fda293ac09caa6fcbea6fae45e545caddcb3d09b1b",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}