{
  "manageEntity": {
    "action": "Save",
    "entityId": "321417727",
    "entityType": "Track",
    "nonce": "0xf994ef5c35cbdb72b73bb3aba0c92961bd1dcc0e2bb20fe8fa17984482b706c9",
    "signature": "0xbdc5596fc3493787eea30c18aaf583fd63bd16849ac6ad7494065e40d110c22948636a20358b4b63409ac69e50340a975408555f255daf5748255ca345d28cf31b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}