{
  "manageEntity": {
    "action": "Save",
    "entityId": "263336894",
    "entityType": "Track",
    "nonce": "0x0293b15c25ee60ce1c68420466e5212041cacfa69ac621099c4acead1358d161",
    "signature": "0xccf074e9b28fbbcb059e32cb7418f84f2d860c4d82215345008d369c7c2f6be1523e9268f3d0709f6ef420de447851a16b757fb7f44e7117d7be5ad170d8e9a41c",
    "signer": "0x1D0c500EC847246923045cB0a285242A93723f30",
    "userId": "302385956"
  }
}