{
  "manageEntity": {
    "action": "Save",
    "entityId": "1102598892",
    "entityType": "Track",
    "nonce": "0xf7dad2dfe0f006fb54b1330c06719dbc10e4679905393e56b292030074b96a56",
    "signature": "0x505de75beb8d46c3d0d0507a5a940e07ff6e648f44118db353c435e19004b664594338a3db37d388b8318163f6d56f3c6d976d09dbb88d517a54a8d60b5366011b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}