{
  "manageEntity": {
    "action": "Save",
    "entityId": "31576803",
    "entityType": "Track",
    "nonce": "0x275cbf1ba90c193cf99c8410b69ec733b4a6b19535cb263128da5c07f015922d",
    "signature": "0x1a671a1e1aae5a1e0d6622c8b51d3a596efe0c0c2e2b3defc8b7773879d1ab704f0facd6cccc7a754c4cfe58b33793b2108c61e92d402462aa053c264d3d57e11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}