{
  "manageEntity": {
    "action": "Save",
    "entityId": "193288",
    "entityType": "Track",
    "nonce": "0xd4441e2485e36d2d8a19b0b98c54aae18a232dfa84fdc2b3651d40c0f653470c",
    "signature": "0xa5e83e8831414e07cc4f410e32f457ee6fd686dd05b10deedaf60b79d26f7a782ad9403bd6e008591850217ca42ff0f80292644743e7e508b0b88ba7896f3b441b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}