{
  "manageEntity": {
    "action": "Save",
    "entityId": "429217425",
    "entityType": "Track",
    "nonce": "0xab5c98eddde2d9d34f1d2c0d95cceac0ce59be31a36fd07d1a2073a75d874f63",
    "signature": "0x68a4fc6c0ded75660238453f4d7389d8fa2782c34b6f2dc7bb6d5f229149247856d3339144301e708335200f00af1ed7f802a1162f7cdf7656c8683882e168e51c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}