{
  "manageEntity": {
    "action": "Save",
    "entityId": "1603057775",
    "entityType": "Track",
    "nonce": "0xbb8339dd73b8aea83700bd30931065ddb957f3065d9fe62345135aa5947d9814",
    "signature": "0xd4e9fe6180e6718129d5ee8021a8d6203f75dcf51cc56e154cf5f19a792beec050f271280c628be8efdb3c8a8acd757c00597cd3c08c5ece8edce1c70ee6a54c1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}