{
  "manageEntity": {
    "action": "Save",
    "entityId": "11600148",
    "entityType": "Track",
    "nonce": "0xa7ace0c56ea90d3094043103892481b5cf230cbcb07fc29d0335e3381d768574",
    "signature": "0xc71bca745838e275ef548990de1a23d11eec8718632e56a00ac7f2f6d24a6c120027b2a82ffb17b3bec0b4d4ac3dcf17cd13933ddec070d4849f2bc571343aec1c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}