{
  "manageEntity": {
    "action": "Save",
    "entityId": "50994",
    "entityType": "Track",
    "nonce": "0xe736fc969b7d4ae40850d40445382f3cd5bd8d293c3886d3b79c6d309905d48f",
    "signature": "0x48b4c1aa33b33792c7d5a8c5aa3821e5d259ff3c92257d598e5f7acfe150436661051ff06403c8d1db9a38f7f5450a86f36df1d97fec6a98b48a28a642aedb8f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}