{
  "manageEntity": {
    "action": "Save",
    "entityId": "1865085077",
    "entityType": "Track",
    "nonce": "0x7aebce4920d1610bbe786b0c22408b2cee59213b62e2925d468b8ff7817852f1",
    "signature": "0xcb7f9d5821916f58632242bc78954daf233e233b0f31f94801e4afaac0b5713d263423405f20832149ecab96b95396588c90f308b389bd8e1d70ae21f6b0c7b71b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}