{
  "manageEntity": {
    "action": "Save",
    "entityId": "967700439",
    "entityType": "Track",
    "nonce": "0xb4ccbba3c66bb738fce226263a3291e77af95707a623a20735a4fcda009157bf",
    "signature": "0xb0ecf30f79f8854d50c405d1d27b45899a5edeffed82c7122648a442d0fe291b4f9f8f6659933261625d8a72b9c49af193ab370a6e2b0d16b8725d9bb28d68031b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}