{
  "manageEntity": {
    "action": "Save",
    "entityId": "20825059",
    "entityType": "Track",
    "nonce": "0xde2b2dd3bf9044211be6fe8a4edd0d5f806f22a2e1afeaf03204086f6366282c",
    "signature": "0xcf80a9884a31053a551a4d8d43169bbc132b0ed484fe4fd8301527316d104e555e1c565597c208c28bddf29f2a176ded65983a102c42c89827bd980f346f85e21b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}