{
  "manageEntity": {
    "action": "Save",
    "entityId": "982373522",
    "entityType": "Track",
    "nonce": "0x1ce8afe44244c99813b94fd4227ca06341055841f8e7f54e36823a5b5f3abb3c",
    "signature": "0xc11f55fda491e5c589f1d0275b4ef58a32be2b63a9ca523eabbea4334cddce42050b82cb257e29899a9f5b1a32fdfc515d434d9a64ebbb6c214518887fa3f9f31c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}