{
  "manageEntity": {
    "action": "Save",
    "entityId": "809857315",
    "entityType": "Track",
    "nonce": "0x0e5f567173c1f48491404ba0df8319d3577451075fd2ea029b13018fccf66945",
    "signature": "0x69356bdb8bb32bd9429217fc6b284f07279ac520f2c74ed8128698fed9560a845abd6b6d33bf5eefc82e6100d98391ba7d3948d902ad6e5c7031ff40740c541e1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}