{
  "manageEntity": {
    "action": "Save",
    "entityId": "983128",
    "entityType": "Track",
    "nonce": "0x6e30f4994f3af8777ebfb5ead18a063b6e216e080cde6e23bf8ff0d1e62cfb17",
    "signature": "0x9c11e1029079c8b3b265b81a026982f45288c0557974a9f18b4a45ca0700a45b46e9271b51c0f7edbd0a34e038fbf9e13a5ec8a7f6ec1d156ddd2b8f96cf088c1b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}