{
  "manageEntity": {
    "action": "Save",
    "entityId": "1418130054",
    "entityType": "Track",
    "nonce": "0x8429810e588fbf5ee82ac7878b0b010eee7425dd05718c8d4414d690a5089530",
    "signature": "0x3a59b93d5818ed4be1f43ffec15e5b057d4c3ecf950e1f517020c7a1c48198ae37b576a612b320a18e2ca613d35221e4a3616c58cbf41b5a2d270091bb7d93761c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}