{
  "manageEntity": {
    "action": "Save",
    "entityId": "1445159197",
    "entityType": "Track",
    "nonce": "0x7bdcfbb124d9bdd197b5466a1430d54dc509f6610a23e4dd7831922b880944a5",
    "signature": "0x9832a481a2585f7ddf31b7bb4418238d8d386f5a54f17a29ca5182b65829b395062c833339c7a789117d509aade5b62d64a03b461ec853c9b9a2d7bd99f3e3481c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}