{
  "manageEntity": {
    "action": "Save",
    "entityId": "1953866479",
    "entityType": "Track",
    "nonce": "0x57dbbe04b84595a1eeb33002a4700cb84b82dd35f352e321665005258e59e52b",
    "signature": "0x2605d2cf93b80f942772a77915efd986ca48c5dfb048135d06b50809c8d0e8041efb13038cc08f212222bad0bac17b600d82ef4ba318685013ac772c0c4758251b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}