{
  "manageEntity": {
    "action": "Save",
    "entityId": "2044936866",
    "entityType": "Track",
    "nonce": "0x4b5f190e3c3d1ea3f16123b5b215a0ae52168706bd207b5df4ae884b0393fcf1",
    "signature": "0x161558f165eaf594ebfab6de9a58864e1c015c44af23eb1ba28e84918630ab48707b23053f8ea86d75e9e204cda42afc44fc8fd6689ebd9c964ef52ab77cc3c61c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}