{
  "manageEntity": {
    "action": "Save",
    "entityId": "209282",
    "entityType": "Track",
    "nonce": "0x810f1aca3eae019face748f9b947e8d9a8c10875fce28d332119b43a58763fc7",
    "signature": "0x88287f21945bcef4c4b03dfcc923602e91675d1f925e071b4e6e1bbb502072a17dfb5d723f8f8407c203004ce5ce8c5aea6279316cda82912bc7a4a744c0b91a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}