{
  "manageEntity": {
    "action": "Save",
    "entityId": "1197542051",
    "entityType": "Track",
    "nonce": "0x83e6faf1435d2e2f431bb0dbae0021f68f6d42144c01cc45b4215bf9c1ca1144",
    "signature": "0xa1f59a433ae6afbe2a72ea933e6169e28c2dcfd8cdf54d3db00f8a50a02e3e5a669b1d9b0c07e1f6c89a41efb4fcbc61ff93388d7e0086dfe60d19e4f072c6f01c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}