{
  "manageEntity": {
    "action": "Save",
    "entityId": "4931",
    "entityType": "Track",
    "nonce": "0x5378677842d08ff55422f63df6376d43ccb7957e19e31a8d9f44f2d1b54412e6",
    "signature": "0x739c35169b22408767908994bae8d053f8f38add229a04bdc22e1a3a861d57ea4fe66c5d9d84a1fee21aa9c20d8fe3d08cab34176e884201f25fb6323e2a1e6f1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}