{
  "manageEntity": {
    "action": "Save",
    "entityId": "1831958781",
    "entityType": "Track",
    "nonce": "0x29e63a98046e92b97dc77dac27b9b4259187826ad240fa56ee1aa2d896af3207",
    "signature": "0x4e587c2f60f25ef046c75c50bb13e11299872c3bf84d9a26110449f129d6520201984f0cd8af3d442a456d38e6490ce8942c5679d20b9b567ef0989f3a1c1efa1b",
    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}