{
  "manageEntity": {
    "action": "Save",
    "entityId": "2007991445",
    "entityType": "Track",
    "nonce": "0x8830945316e525d5359b9599a8e089edf145739ee4a59b5dd951a82e8714766c",
    "signature": "0xe3287071258e441f2518c5433f0ea9dd0d42ab062e0732fec848701c4da68b022d6392b6e2d65c747241ae47af4be8055975055f5479586f929081300ebbe6cd1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}