{
  "manageEntity": {
    "action": "Save",
    "entityId": "398125737",
    "entityType": "Track",
    "nonce": "0x6e021117c9b5d7782dba09a5b1e2b2f5566a39cbe65c82b234baa4671bcfe5bd",
    "signature": "0xf1a1b5ee5a5f6e35941e44f6368d69cb215cf770557e0d660d1571771bfe2555596ce51c0ac8b9d91a22ad75bbd9e1531d2178c0bc0a7d62e3be8d12368eb9291b",
    "signer": "0x36d29AA5C780341f3b35bDE6c1411a7Abcf8794C",
    "userId": "571117272"
  }
}