{
  "manageEntity": {
    "action": "Save",
    "entityId": "1291737432",
    "entityType": "Track",
    "nonce": "0xb0d60af92c59d0a9b85132d6532ffd2dcfce4f31957a288742e1e232ef24f36a",
    "signature": "0xc9382482f6d1902af069b1da6afc077b76b420b8754ab0b2724b473a08c79b8924cb8215a740693be704d1b653ca144a1b31370a0a58139a9a1257138cb36ac41c",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}