{
  "manageEntity": {
    "action": "Save",
    "entityId": "1468198774",
    "entityType": "Track",
    "nonce": "0x52b89680ee52d34f30c864bb6e2e79c73ddf30c5b88cc6cf4a0396d7479eb4d0",
    "signature": "0x3982dcf9298927bdc893ec8b5931f02dcc9d9a3ab711404ab9e9dc806d98dacd7d9a8cbb25455df3104246943e3f609ef445e6546e44f49bf06e8377769755d01c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}