{
  "manageEntity": {
    "action": "Save",
    "entityId": "1637723731",
    "entityType": "Track",
    "nonce": "0xfdbe88f10feeb6ed87cc5e1f516cdc678ac6a01493d675d95c2d5335f905bc75",
    "signature": "0x98a7b1c47cb6ca89aecd512aa41d6b5d672aef88b1ca54ad5d9f1f4fb3d1e96d7f8302c26ac611cd0d45ac99bb166e23a45e14c228869eb66eaa005de7cd8a261c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}