{
  "manageEntity": {
    "action": "Save",
    "entityId": "423315",
    "entityType": "Track",
    "nonce": "0xf471ec00a7a94d2719571e2deee2878bba1b6a70a135267cda066b0a7a1d5328",
    "signature": "0x3b9823ff2b9b18190b7f4335332ce5e1d02231f90798d63d20b9bb1a4406ea513730ba30fc0cf507b28f1a913ad3efeb12e3454115c0d796e24b73f6c096b13b1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}