{
  "manageEntity": {
    "action": "Save",
    "entityId": "352951",
    "entityType": "Track",
    "nonce": "0xb226a37f5dfa9bbbcd2b325cc3c059fe36359d02988dd0a33dfefb116d070ed2",
    "signature": "0x659d2ae226386e1f3b969c2d74b9048c1181f8eba99759ad275dd4a5d53fe89342ea3ae66206fb66ec9a9854d0dcfa3406a005a396c8e43709c37fccd492bcbb1c",
    "signer": "0x316933E449A0b429014E405447c447C9Bc472bE9",
    "userId": "451684863"
  }
}