{
  "manageEntity": {
    "action": "Save",
    "entityId": "110519871",
    "entityType": "Track",
    "nonce": "0x608a526e7de3d87d2b4eb0a87f7456488b4061d9b52bae9badf770d43a544e8a",
    "signature": "0xced4ed82a7a25f9947ac48359e2e4a6ad0596ec8719df9b6b23050282186ae506dc39992654edc523d0bb50aaa80522effd0f5b97d9f2a6eb1957975459c53c51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}