{
  "manageEntity": {
    "action": "Save",
    "entityId": "73267278",
    "entityType": "Track",
    "nonce": "0x8aa1a8207a55be629b4a1c610c73cefc0241da190e00fa517c04f219a1de919e",
    "signature": "0x247af95c9646bc0fcac48d3d59f6952aba3b746ce43b108e22d667eb94dabb590c633874b773f21b1d3d2819e254e2e1860b68377e4ab29efbae4e295743ba461b",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}