{
  "manageEntity": {
    "action": "Save",
    "entityId": "753979634",
    "entityType": "Track",
    "nonce": "0xee5040a2138cb18237a6227298c8f31ae4f2b2a20fe82f276c551970a5b2fb5a",
    "signature": "0x49c0e6f2f11eac3153c115c9cce1a2166e62e695a3bd1fe5a77037b37c340fae6787131275d056b62de9821893f6334d8afdfa219b288837dd10d6df69b77f461c",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}