{
  "manageEntity": {
    "action": "Save",
    "entityId": "1350826306",
    "entityType": "Track",
    "nonce": "0x918ea3e77af97f6618a6198dfda5d60e6498fcc4da73aef5b826e290969ca49d",
    "signature": "0x0ccaf5d5167c66e8180754592997c1afbca2f9c0841d2c093f459bc2853441a40562d4e7329eb16789b1204d4f83954462bf4878b4dd9b858e4bf094e0c30b721c",
    "signer": "0x375963f281CEdF4D9D180496F80A256D574daBa2",
    "userId": "981824750"
  }
}