{
  "manageEntity": {
    "action": "Save",
    "entityId": "672356219",
    "entityType": "Track",
    "nonce": "0x274eb2364f1a9efa6a1cab47a89651df3090cab3fa64e5fdca549168f758f276",
    "signature": "0x538e99a155e6f65ab1786772649715b50db3b3a07e7ce0f3a9866b4907a6ed4015ce10e3ce2dfb7dbe916df711b145983d4f8b9d8a73272d25c7ab32b77c456a1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}