{
  "manageEntity": {
    "action": "Save",
    "entityId": "1343891306",
    "entityType": "Track",
    "nonce": "0xa4b2b4e9b723ab863b6642edf12c8170b88810854f98333238c9fc0e96c6f9c4",
    "signature": "0x24afd1122e9538ff77f5306cebacddfdcd8a08a5beff9f3cc8e25834578046743e13e583642b969e4ebe9bc8a94ec995bdd8e4fbe8671d4735fade178f8ce1b01c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}