{
  "manageEntity": {
    "action": "Save",
    "entityId": "778921105",
    "entityType": "Track",
    "nonce": "0xda982287e215a518f350ba13ad24d634369662beb6d068bc4824fa5b33226301",
    "signature": "0x06127f0b4e0eee4bdfdc46af147f67c46e3f1d278e2f4798a89f4c1106c43abe706004a9d5229c74e75fc8727fbf759587af699fa009cd2fbfc8e0754894a8c91b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}