{
  "manageEntity": {
    "action": "Save",
    "entityId": "1916176854",
    "entityType": "Track",
    "nonce": "0x83bacdd98c3ae7dd01ad2ec3fa2b4b2bb47f4f2e25e588e54162a589b33d524e",
    "signature": "0x4afd244c7c4f94ef9057bfed9ff51c08bc7c223c0d21b843b48fb76fa650e24b4dbec8830fa21f90ed5844eda38a4c92f964d1a96d21fbde26764d018322c9d31b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}