{
  "manageEntity": {
    "action": "Save",
    "entityId": "1702802992",
    "entityType": "Track",
    "nonce": "0xd3241c463072e4456e531bda4c09ddefc6faba0dae06ec0190e9ebc192ddc65d",
    "signature": "0x2b5a467c2e860451f574ccf947b15907a343abe1175c0b485ce07a69bbda5c2557247cfd57fbb5015e23b3ee4e3eedf49862c3520f503f0f2e31e7590d52cb581c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}