{
  "manageEntity": {
    "action": "Save",
    "entityId": "11441101",
    "entityType": "Track",
    "nonce": "0x6958c59ef17c86d6655d5bfbd84ac4213f52c32d77af56d843cd512e4ca7e7ab",
    "signature": "0xfbfa5e042a1a063f9e7b776935f77cee024de621f4f37da12ad9f847e6de7a9b79ec9ca357b08d023cbf44513c48d58ce7f15214e05838c1aea2ececa825ecf61b",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}