{
  "manageEntity": {
    "action": "Save",
    "entityId": "2114863362",
    "entityType": "Track",
    "nonce": "0x35962b31230bc7cc40f6d7c370e77da61fa8628b82f703a0566c1efa83d9de2d",
    "signature": "0xc9380b0020d6898c599327aa51c9bd623cd497269dd438c56d8c6e9410dc57d12b47c61ca1f39f69f71746f30e838403b45e2cb832a4e92898428971b05d6af01c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}