{
  "manageEntity": {
    "action": "Save",
    "entityId": "996100670",
    "entityType": "Track",
    "nonce": "0x16a078c3d4d2bc090f5ce2d74541ea586bdc281aa9fb97fb48b8ddcfead21aaf",
    "signature": "0xe321b4044b3a97eb17ff8d9874a0b6c81a717d171ade41590b9b055bdbd15c6336ec0c63fbc1e9f8bb6f0df16d3fe1752182e56730d7cf517511a19a095a5f951c",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}