{
  "manageEntity": {
    "action": "Save",
    "entityId": "1416946406",
    "entityType": "Track",
    "nonce": "0x69b909463f3167a8aa5f56577a80b1389256c35a5806fdafc506ce5f5c3ffbe4",
    "signature": "0x40dd9c49b2b9f522d6258fda08566dd4403f9f928e770057fd58bd097b67d95100370e712f0307a7ddfa74a4b8f5970b4aebfe1e54e7b0db35f3404f654eb1011b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}