{
  "manageEntity": {
    "action": "Save",
    "entityId": "214780",
    "entityType": "Track",
    "nonce": "0x2484f9672ce1e18f5a79a438fdd0ac6ce29e2b761c571b25a95b95e26b7277b1",
    "signature": "0xc396cbf7b7fea7fe9460b9e774e43f1b0143f8ebf194bfebd837c6520ecfcbbb25389b91ab97977bdfa1e8a90889f233c83ed8ba7e4608a10d89cd1631af3b771c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}