{
  "manageEntity": {
    "action": "Save",
    "entityId": "1327998499",
    "entityType": "Track",
    "nonce": "0x781a16d39eac4d7c8a7b0e338d7c705d986fb025a1550d395401bbaa8f5d8ca6",
    "signature": "0x765497824589d6be4d8da30501ebe0e0d2b900cb259746d6923e36178d038d9003a15eff350299c550a121a4d250403afe25f83daeb1773372ec2f31f5da84a81b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}