{
  "manageEntity": {
    "action": "Save",
    "entityId": "291333079",
    "entityType": "Track",
    "nonce": "0xdba1689ea25560e83145d01e0563d3ff9b38d14203d1d40c735f2abdffe31a37",
    "signature": "0xa6c80b241f269a0fc089d0b1bb99569ba845edaf6470891292f0b9d68540cc607be837e69d5e0c3cdca408543c50b954ec8a69d64d28ab48246197c0a1d103db1b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}