{
  "manageEntity": {
    "action": "Save",
    "entityId": "277384459",
    "entityType": "Track",
    "nonce": "0x90655e0cbbfe22d8a7ebfc4c04690755059e5b32462ff0a3ad507f6d885ad0c8",
    "signature": "0x93403e8b9338dc5a88df1769ec06e2f63ac12d45cb0c0001b724fa0bc28215ed473495228b16e1d72ee07da832142ea2990ea19bc90800ec4b347bbd178b658b1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}