{
  "manageEntity": {
    "action": "Save",
    "entityId": "155491",
    "entityType": "Track",
    "nonce": "0x55e8599b8f3a5f406d7a26861495e4a847c3bdaf6b10fdabe657902296b17e0f",
    "signature": "0xa35c033cab5e4f1fdbd5a556ff739557761f6eda2660b2ec81c3ccddbd9914e817146eb5182a198060ff9b1a5d2c1fc081b30447ddf809616b46a0ff4184ce121b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}