{
  "manageEntity": {
    "action": "Save",
    "entityId": "1496021886",
    "entityType": "Track",
    "nonce": "0x8d8dd70b98f55ff942a15b8965c348bd3ce743b21c6900765c34feeb8abe2ee0",
    "signature": "0x6a1656097f588a1bdeebec95c3a2d97c6170a781b3d59133fbcbc743b0f6c7cb5840a114b9cbe6ce7d5f6f4fd31a364f11c6db06df8cfe1dbec85f36d26332b71c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}