{
  "manageEntity": {
    "action": "Save",
    "entityId": "277694",
    "entityType": "Track",
    "nonce": "0x99cc374fef2ca1ee12c9c008b020499285dff2e9f402842b40473cd24d6a6826",
    "signature": "0xb17b08c52f6b63ea6e40779191187691d3791ea70691d911cce6e14bea207d5146cf068e18208974ee6c1a9fc6bc55199dc0d11b57954ba7f2e05233640cf6701c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}