{
  "manageEntity": {
    "action": "Save",
    "entityId": "326679",
    "entityType": "Track",
    "nonce": "0xaaa0a384e267e53e3ecf3ef09cf7b40639f904c9d3ac6e411c46f876ac6957cd",
    "signature": "0x92eae6e02258cf723889ffc6b3499441474f9bd3d8519109251e719d0bca7e206feba5b1818425a0052c79d9a14f7a1734a93aee0dae22037f047cd583d0ce4a1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}