{
  "manageEntity": {
    "action": "Save",
    "entityId": "1154047396",
    "entityType": "Track",
    "nonce": "0xcf1b8e01f15d7456615781a136bdf6cb0e66cc72c8f1770c2304688ff14def8e",
    "signature": "0xa3f43ccb6d11e5b6defd82d5ceb5ffea4a1c01bbbd54853647c2bfb91d44d18513fe35e7d2473e85f4fbe72405a8d2767ae78488a8aaa2bd603ff3b3d7da4ebd1b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}