{
  "manageEntity": {
    "action": "Save",
    "entityId": "695430",
    "entityType": "Track",
    "nonce": "1792092640843056432",
    "signature": "0xc19467dfdede750b20ed127cc12547925e4ef5a710ca1b71d2f8fd1d12582b37581c2d00103018b4ce134afeb1f103b3b1c1e6e6b1d525d43b15c40b7319db2d1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}