{
  "manageEntity": {
    "action": "Save",
    "entityId": "1965814161",
    "entityType": "Track",
    "nonce": "0x2c468dff269c41312a0bee89eaf91a7d13557ed5f27b681ef01424f83b0285ee",
    "signature": "0x53e8d40f13173a79fcb8147531610654d9b51fc607ebe18a5cc832811558960e42c151d298740ac018eac2027008678a37e07676cb67e8850c43e453deed7f151c",
    "signer": "0xE7D37531a757aEaf8B2c8037a79C03819edc20Dc",
    "userId": "870684573"
  }
}