{
  "manageEntity": {
    "action": "Save",
    "entityId": "1809370998",
    "entityType": "Track",
    "nonce": "0x8338ee7206aa671d506fb28b2632df9c3a47635ddf676866f1ce0132125ab61f",
    "signature": "0xdcf0a68cf0083b0c35f0f3fc56698fcd13ad6c91e5387878ef5243cba90fcf747cc8ef02d3d186c3ea9f2467351de9f05f48e8b91d5a7b1baa77baff74caeed11c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}