{
  "manageEntity": {
    "action": "Save",
    "entityId": "548740993",
    "entityType": "Track",
    "nonce": "0xdedae2873ce6d10026084a2348399a766b6305ca30f0000d3dec8198acafe796",
    "signature": "0x0e3a7d7d935d45b77ef6372d314410865cf98ad20d2ffa16589c1a59b0e27dff43e44cd171b4763a2e1085dedee90fe9bb0c2100ca76afee7c746fb54f5554191c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}