{
  "manageEntity": {
    "action": "Save",
    "entityId": "1083132",
    "entityType": "Track",
    "nonce": "0x4b7583603ecc59abc1873263f8ddfcb616c1c084bffbdb79d08464da629eba3b",
    "signature": "0x6ab670b07c65175a3633f665b87da58aa0686a1aac7069c75938dd8ebc7fee4661c2704b5e0468160ca35ded28e267fd4d639eb20795fe8736247560b8de58e11b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}